Hopfield network

(Or "Hopfield model") A kind of
neural network investigated by John Hopfield in the early
1980s. The Hopfield network has no special input or output
neurons (see McCulloch-Pitts), but all are both input and
output, and all are connected to all others in both directions
(with equal weights in the two directions). Input is applied
simultaneously to all neurons which then output to each other
and the process continues until a stable state is reached,
which represents the network output.